15-09-2021

Radio Doctor For Motorola Radius Gm300

Motorola GM300 programming with Radio Doctor ?

#1162

I have downloaded the Radio Doctor software and installed it in my XP machine.
When I run the program and try to connect to the GM300 via the mike socket pins 4 and 7 I get the following problem.
when I go to read codeplug the data light blinks once and then the message NO CONNECTION comes up.
What have I not done, or, what have I yet to do to overcome this problem.
Thanks,
Brian


#1163

toggle quoted messageShow quoted text
On Dec 3, 2014 3:44 PM, 'briancoleman39@... [RadioDoctor]' <RadioDoctor@...> wrote:

I have downloaded the Radio Doctor software and installed it in my XP machine.
When I run the program and try to connect to the GM300 via the mike socket pins 4 and 7 I get the following problem.
when I go to read codeplug the data light blinks once and then the message NO CONNECTION comes up.
What have I not done, or, what have I yet to do to overcome this problem.
Thanks,
Brian


#1166

Will have to check my diagram if I get time but I'm sure a resistor was needed between two pins on the rj45 (or was that a Jedi thing??).
toggle quoted messageShow quoted text
On 4 Dec 2014, at 0:44, 'briancoleman39@... [RadioDoctor]' <RadioDoctor@...> wrote:
I have downloaded the Radio Doctor software and installed it in my XP machine.
When I run the program and try to connect to the GM300 via the mike socket pins 4 and 7 I get the following problem.
when I go to read codeplug the data light blinks once and then the message NO CONNECTION comes up.
What have I not done, or, what have I yet to do to overcome this problem.
Thanks,
Brian


#1164

At 11:33 PM 12/02/2014, you wrote:
I have downloaded the Radio Doctor software and installed it in my
XP machine.
When I run the program and try to connect to the GM300 via the mike
socket pins 4 and 7 I get the following problem.
when I go to read codeplug the data light blinks once and then the
message NO CONNECTION comes up.
What have I not done, or, what have I yet to do to overcome this problem.
Thanks,
Brian
Brian, I don't know you background so if you know some of
what I've written below please don't take it as insulting or
talking down to you.
Are you set to the correct COM port ? Look at the Device Manager
screen under Ports and see which COM port is actually in your computer.
Then set RD to that port.
Are you using the correct cable?
You have to use a made-for-the-situation cable. I hope you
DON'T expect a cable plugged into the ethernet jack on a computer
on one end and plugged into the mic jack on the radio to work (don't
laugh, I've seen it. You see a lot of stupid customers in the 2-way
business)
For one thing, the pin numbering has pin 1 of the radio at the top.
The common RJ45 network cable pin numbering is backwards
from Motorola.
Second of all, the radio is NOT made to handle RS-232 voltages.
Motorola has a special interface box (called a RIB - Radio Interface
Box) that goes inbetween the computer and the radio-specific cable.
If you want the history of programmable radios, and in great detail,
go here:
<' target='_blank'>http://www.repeater-builder.com/motorola/rss/rss-index.html>;
Now the Radio Doctor software is unique - it was written by
someone outside Motorola, and specifically for Windows.
It can handle USB based serial ports where RSS is limited
to COM 1 or COM 2.
So the RSS problems concerning a slow computer and
only COM 1 or 2 mentioned in the articles above do not apply.
But you still need one of these two setups:
1) A RIB and a radio-specific cable (DB25 to Maxtrac/Radius/GM300)
2) A serial cable that plugs into the radio, and has the
RIB components in the connector shell. Something like
ebay item 160363972038. If I'm going to buy a cable
I use kawamall - the people in our local group have had
very good luck with them. Not 100%, but close.
Not that Radio Doctor will work with a USB-based cable,
and Moto RSS will not. If you plan on ever using real Moto
RSS with that cable (i.e. sometime in the future) then DO
NOT get a USB cable. RSS runs under DOS and DOS
has no concept of USB.
Personally, I prefer a RIB-based setup as I have a real
Moto RIB, and the non-kawamall ribless cables are
inconsistent - this first showed up with a friend that
has 8 or 9 GM300s and a few Maxtracs in his extended
family - a couple for Civil Air Patrol (low end of VHF),
several more for ham radio (6m, 2m and UHF), all of
the UHF ones include the GMRS channels, another is
the dispatch base at the business, and a few more are
bolted into the business trucks. The chinese ribless
cable he purchased would program some radios but
not others. My real RIB and cable did every one,
every time, and with his computer.
Mike
#1167

http://www.batlabs.com/gm300.html has a lot of good information on the
M120/GM300. http://www.batlabs.com/images/gm300mic.gif is good for info on
the mic socket and its comparativeness to the rear accy plug.
http://www.batlabs.com/images/maxpin.gif is the diagram I went off when
building my programming lead for my Radius rigs and it's worked great across
the range (including Warris GM339 etc). I can't remember if it was this
thread or another asking about the radius lead that I replied to earlier on
the iPhone.
I agree that the RIB is the best way to go, I have both cables (the multi
ribless thing and a RIB) and whilst my RIB is an after-market I found it a
little more reliable than multi ribless. Since I needed the rib for my Jedis
(MCS2000) and that's what I'd already purchased it for I found it quicker,
cheaper and easier to go down the street to the electronics store, purchase
a few RJ45s, a DB25 and shell and 1m of 8core flatstrap (MUCH easier to
crimp and play with when it doesn't need twists). I have the RJ crimping
pliers for my computer work so all sweet, professionally made cable with any
odd jumpers and resistors stored in the DB25 shell out of sight and touch.
I've used the same parts and technique now for the Jedi lead and
Radius/Warris lead with great success (have to name them in permanent marker
since they look the exact same lol). Once you have the RIB and PC2RIB cable
you are 3/4 there for most Moto radios :) so a wise investment if you want
to play with Motorola.
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toggle quoted messageShow quoted text
-----Original Message-----
From: RadioDoctor@yahoogroups.com [mailto:RadioDoctor@yahoogroups.com]
Sent: Thursday, 4 December 2014 7:32 AM
To: RadioDoctor@yahoogroups.com
Subject: Re: [RadioDoctor] Motorola GM300 programming with Radio Doctor ?
At 11:33 PM 12/02/2014, you wrote:
>I have downloaded the Radio Doctor software and installed it in my XP
machine.
>When I run the program and try to connect to the GM300 via the mike
socket pins 4 and 7 I get the following problem.
>when I go to read codeplug the data light blinks once and then the
message NO CONNECTION comes up.
>What have I not done, or, what have I yet to do to overcome this problem.
>Thanks,
>Brian
Brian, I don't know you background so if you know some of what I've written
below please don't take it as insulting or talking down to you.
Are you set to the correct COM port ? Look at the Device Manager screen
under Ports and see which COM port is actually in your computer.
Then set RD to that port.
Are you using the correct cable?
You have to use a made-for-the-situation cable. I hope you DON'T expect a
cable plugged into the ethernet jack on a computer on one end and plugged
into the mic jack on the radio to work (don't
laugh, I've seen it. You see a lot of stupid customers in the 2-way
business)
For one thing, the pin numbering has pin 1 of the radio at the top.
The common RJ45 network cable pin numbering is backwards from Motorola.
Second of all, the radio is NOT made to handle RS-232 voltages.
Motorola has a special interface box (called a RIB - Radio Interface
Box) that goes inbetween the computer and the radio-specific cable.
If you want the history of programmable radios, and in great detail, go
here:
<' target='_blank'>http://www.repeater-builder.com/motorola/rss/rss-index.html>;
Now the Radio Doctor software is unique - it was written by someone outside
Motorola, and specifically for Windows.
It can handle USB based serial ports where RSS is limited to COM 1 or COM 2.
So the RSS problems concerning a slow computer and only COM 1 or 2 mentioned
in the articles above do not apply.
But you still need one of these two setups:
1) A RIB and a radio-specific cable (DB25 to Maxtrac/Radius/GM300)
2) A serial cable that plugs into the radio, and has the RIB components in
the connector shell. Something like ebay item 160363972038. If I'm going
to buy a cable I use kawamall - the people in our local group have had very
good luck with them. Not 100%, but close.
Not that Radio Doctor will work with a USB-based cable, and Moto RSS will
not. If you plan on ever using real Moto RSS with that cable (i.e. sometime
in the future) then DO
NOT get a USB cable. RSS runs under DOS and DOS
has no concept of USB.
Personally, I prefer a RIB-based setup as I have a real Moto RIB, and the
non-kawamall ribless cables are inconsistent - this first showed up with a
friend that has 8 or 9 GM300s and a few Maxtracs in his extended family - a
couple for Civil Air Patrol (low end of VHF), several more for ham radio
(6m, 2m and UHF), all of the UHF ones include the GMRS channels, another is
the dispatch base at the business, and a few more are
bolted into the business trucks. The chinese ribless
cable he purchased would program some radios but
not others. My real RIB and cable did every one,
every time, and with his computer.
Mike
------------------------------------
Posted by: M M <wa6ilq@outlook.com>
------------------------------------
New list members should review the FILES section of the group or read the
archives prior to asking where they can get this software.
<<' target='_blank'>http://groups.yahoo.com/group/RadioDoctor/files>;>
------------------------------------
Yahoo Groups Links
Motorola gm300 programming

Motorola Gm300 Radio Doctor Download Windows 10. Amateur Radio Utilities. Programming Cable Motorola Radius Maxtrac GM300 M1225 CDM CDM1250 CM200 CM300 B3. Download Motorola Radius GM-300 Radio Programming Software Ham radio, amateur radio, two way radio, cb radio, walkie talkie service manuals and reapir information.

Radio

Introduction.

Motorola radius software

The Motorola GM300 can be re-programmed quite easily to allow use on our Amateur Radio bands. The radio is made in both a VHF and UHF versions, and makes an excellent 2mtr or 70cms mobile/base station radio.

Most of the radio's I have worked on have originally been 8 channel units. These can be modified to operate on 16 channels quite easily.

300

The programming interface can be made for a low cost. All it consists of is a RS232 to TTL level converter, that connects between the serial port of your PC and the radio's microphone socket.

Amateur Radio Conversion.

The radio requires the Motorola Software which can be found if you ask around or search for it on the FTP sites on the Internet. If you can't find it then try your local Motorola dealer who should be able to help at a small cost.

You also have to make an interface, or purchase one.

To program the radio onto the Amateur band, you can find some versions of software that have been hacked into allowing frequencies to be entered to bring the radio into the amateur bands which normally are just bellow the original working frequency. However this depends on your version of software, if it's a un-hacked version then you have to press the key down when entering the frequency. You must release the key when entering the decimal point. For example to program 433.500MHz you will enter the following: $££.%)) on a English layout keyboard. (This is 433.500 with the held down. Fill all of the 0's in the frequency field. This example is the same for both the VHF and UHF GM300's.

16 Channel conversion. (for 8 channel radio's only)

Motorola Gm300 Programming

Gm300

Motorola Maxtrac 300 Programming Software

To program the radio for 16 channels all you need to do is edit a file called GM300.MDF. You do this with the help of a Hex editor such as Hex Workshop. The file you need to modify is called GM300.MDF and can be found in the main directory of the Motorola software. Keep a backup of your original GM300.MDF file, just in case you make a mistake.

Motorola Radius Gm300 Specs

I have made a small video that shows the Hex Workshop screen during the modification. This should help you understand the procedure of editing the file which when complete will give you 16 channels. Click below to download.

Motorola Radius Gm300 User Manual

Procedure

  1. Get a copy of Hex Workshop
  2. Start the Hex Workshop program and open the file GP300.MDF to begin editing.
  3. Go to 'Tools', and the 'Generate Checksum'.
  4. Make sure 'Entire Document' and also 'Decimal' are ticked. Then press 'Generate'.
  5. Look in the 'Checksum-16' box, in my version of software for example this results in a checksum of 5514. (yours may be a different number depending on the version of Motorola software)
  6. Write this number down, as you need it later.
  7. Press 'Cancel' to return to the main window and your next step.
  8. Go to 'Edit' and then 'Find'. A pop-up window appears.
  9. You need to enter the model number of your radio. For e.g. M34GMC00D3AA.
  10. When you enter the model number leave off the last two letters(AB on my radio).Make sure 'ASCII' is ticked.
  11. When you press 'Find Next', you will see your model number highlighted.
  12. If you count 8 numbers after the highlighted section, you should see the number '08' as long your radio is originally a 8 channel set.
  13. Edit the '08' to '10' (note 10 in Hex is equal to 16 in decimal).
  14. You now need to edit the start of the program, to allow the software to run.
  15. In the first few lines look for a Hex number that you can easily take away 8 from.
  16. In my software at address 00000040 you will see the number '78' on the right.
  17. Edit this to be '70'.
  18. Now you must do a final checksum and make sure it equals the original value.
  19. If this is the same, then replace you original file with the modified file.
  20. Try to reprogram your radio with the extra 8 channels to give you 16 channels.